求解一道RC

anastasialiu9 · 发表于 2015-9-27 12:11:13

According to a theory advanced by researcher Paul Martin, the wave of species extinctions that occurredin North America about 11,000 years ago, at the end of the Pleistocene era, can be directly attributed to the arrival of humans, i.e., the Paleoindians, who were ancestors of modern Native Americans. However, anthropologist Shepard Krech points out that large animal species vanished even in areas where there is no evidence to demonstrate that Paleoindians hunted them. Nor were extinctions confined to large animals: small animals, plants, and insects disappeared, presumably not all through human consumption. Krech also contradicts Martin's exclusion of climatic change as an explanation by asserting that widespread climatic change did indeed occur at the end of the Pleistocene. Still, Krech attributes secondary if not primary responsibility for the extinctions to the Paleoindians, arguing that humans have produced local extinctions elsewhere. But, according to historian Richard White, even the attribution of secondary responsibility may not be supported by the evidence. White observes that Martin's thesis depends on coinciding dates for the arrival of humans and the decline of large animal species, and Krech, though aware that the dates are controversial, does not challenge them; yet recent archaeological discoveries are providing evidence that the date of human arrival was much earlier than 11,000 years ago.

Which of the following is true about Martin's theory, as that theory is described in the passage?
AIt assumes that the Paleoindians were primarily dependent on hunting for survival.
BIt denies that the Pleistocene species extinctions were caused by climate change.
CIt uses as evidence the fact that humans have produced local extinctions in other situations.
DIt attempts to address the controversy over the date of human arrival in North America.
EIt admits the possibility that factors other than the arrival of humans played a role in the Pleistocene extinctions.
求问此题正解是A还是B，如果是B，A为什么不对，如果是A，B 为什么不对？个人倾向选A

lixibao · 发表于 2015-9-27 12:59:07

However, anthropologist Shepard Krech points out that large animal species vanished even in areas where there is no evidence to demonstrate that Paleoindians hunted them.这里解释是说是SK认为的动物被hunt 而没有说是M 认为的。题目是问M 的theory
所以选B吧

只在梦里 · 发表于 2015-9-30 04:36:24

大家选B 的原因
1）无定位信息题：正确答案为(B)。做无定位信息题，要首选采用排除法：根据全文大意，去排除有明显硬伤的错误选项。　　2)错项分析：
　　(A)：无中生有：原文提到了Paleoindians捕食大型动物，并没有说主要依靠捕猎存活
　　(C)：混淆文义：C项所说为Krech而非Martin的观点提供了证据
　　(D)：张冠李戴：试图解决人类到达北美争议的是Richard White而不是PW
　　(E)：与原文相反：原文Martin只考虑Paleoindians的到来是原因，把气候变化都排除在解释之外，并未考虑其他可能的解释。

求解一道RC

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